USB-RIM version 1B Radio Interface Module
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1 USB-RIM version B Radio Interface Module Specifications: Power Source Low Pass Filter Cutoff Frequency (F c ) Audio Input Impedance Maximum Audio Output Level Audio Output Impedance Output LPF Roll Off PTT Line Maximums Local Rpt. Line Maximums +v from USB buss Approx. 0KHz. Approx. 0K Ohm Approx..Vp-p Approx. 00 Ohms -0 db per octave 0V 0V Hookup: Connections between the RIM and a radio or repeater are made through a pin male connector. (supplied) The pinout of the interface connector is as shown at right. Most of the connections are self-explanatory to anyone familiar with common radio terminology. Please refer to our website for a list of currently available model-specific connection diagrams. Board Setup: There are MANY option jumpers provided on the RIM board. To access them, simply pry the two case halves apart using a small flat screwdriver or other appropriate tool. RB-USB-RIM v.b Release // Page
2 Board Setup: (continued) Some jumpers are single jumpers in that they are either in or out. Some jumpers have two positions. They are configured by soldering between EITHER the # pad or- the # pad, NOT both. The only jumper where *ALL* pads may be connected is SJ, the Rx input attenuator jumper. SJ PTT Ground Reference Dual position Shipped in the position Solder jumper SJ is used to select where the Push-to-Talk MOSFET obtains its ground. If the jumper is connected between the center and pad, the PTT MOSFET will get its ground directly from the board. If the jumper is connected between the center and pad, the PTT will get its ground from the PC Comms OK output. Thus eliminating the possibility of the PTT being stuck low due to a PC USB communications failure. SJ PC Comms OK Output Polarity Dual position Shipped not jumped Solder jumper SJ is used to select the output polarity of the Local Rpt. output pin. This pin may be connected to signal a repeater s internal controller that external PC controller communications have failed and is no longer in control. Most all-in-one type repeater boxes have this functionality. Consult your equipment owner s manual or our model-specific hook-up sheet for more information. If the solder jumper is connected between the center and, the Local Rpt. output pin will pull to ground when PC communications have failed. If the jumper is connected between the center and, this pin will be pulled low when the RIM is successfully communicating with the PC. SJ PC Comms OK Input Source Selection Dual position Shipped in the position Solder jumper SJ is used to select the input to the PC Comms OK circuitry. For all AllStar based PC controllers, (ACID, XIPAR, etc.) this jumper should be installed from the center pad to the position. Some other PC based controllers (FreeStar) that use the CM9 IC s GPIO pin will want this jumped between the center pad and position. SJ CTCSS Input Pull-up Enable Single position Shipped open Solder jumper SJ is used to connect a 0K pull-up resistor from V to the RIM s CTCSS logic input. This is useful when the radio/repeater/controller s CTCSS output is an open collector type output and will not source voltage. Short the pads of SJ to enable this pull-up. SJ CTCSS Input Polarity Selection Dual position Shipped in the position Solder jumper SJ is used to select the input polarity of the CTCSS circuitry. If the CTCSS output of your radio/repeater/controller s CTCSS output provides voltage or is open collector when a valid tone is being received, jump from the center to the pad. If the radio/repeater/controller s CTCSS output goes to ground when a valid tone is being received, jump from the center to the pad. Also see SJ above for other options. SJ COS Input Pull-up Enable Single position Shipped open Solder jumper SJ is used to connect a 0K pull-up resistor from V to the RIM s COS logic input. This is useful when the radio/repeater/controller s COS output is an open collector type output and will not source voltage. Short the pads of SJ to enable this pull-up. RB-USB-RIM v.b Release // Page
3 Solder Jumpers: (continued) SJ COS Input Polarity Selection Dual position Shipped in the position Solder jumper SJ is used to select the input polarity of the COS circuitry. If the COS output of your radio/repeater/controller s COS output provides voltage or is open collector when a valid tone is being received, jump from the center to the pad. If the radio/repeater/controller s COS output goes to ground when a valid tone is being received, jump from the center to the pad. Also see SJ above for other options. SJ RX Audio Input Attenuator Multi position Shipped not jumped Solder jumper SJ is the ONLY jumper that may have ALL pads jumped, depending on the amount of input attenuation desired. Solder pad connects to a 0K resistor. Solder pad connects to a K resistor. With these two resistor values in conjunction with the K input resistor, values of attenuation are possible. Jumper configuration No jumpers shorted Pad shorted to center Pad shorted to center Pads & shorted to center Net Loss 0dB ~db ~0dB ~.db SJ9 Main Audio Output Gain Reduction Single position Shipped open Solder jumper SJ9 shorts out a resistor in the feedback path of the final audio op-amp. This reduces the gain of the last amplifier stage from.x down to x. This jumper (and associated gain reduction) *may* be needed when driving the microphone input of your radio/repeater/controller s audio chain. Consult your equipment owner s manual or our modelspecific hook-up sheet for more information. RB-USB-RIM v.b Release // Page
4 9 A TRE VCC+ /RES DIS OUT CON TRI GND A CS SCK DOUT DIN PWRSEL MODE VSEL TEST MSEL PDSW BUZZER SPDIF0 GPIO GPIO GPIO GPIO MCU_SCK MCU_INT MCU_SDA MCU_CLK DVDD AVDD AVDD REG_OUT GPIO GPIO GPIO GPIO MUTE_REC MUTE_PLAY VOL_UP VOL_DN LEDO LEDR MIC LEFT RIGHT 9 0 USB_D- USB_D+ LIN_OUT_BIAS 9 XTAL_ XTAL_0 DVSS DVSS AVSS AVSS VBIAS VREF EN FB VIN GND SW B B C D C D E E F F
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